Hildegard (758 – 30 April 783) was daughter of the Germanic Count Gerold of Vinzgau and Emma of Alemannia (daughter of DukeHnabi and Hereswintha vom Bodensee (of Lake Constance)). She was the second wife of Charlemagne, who married her around 771. They had the following children:

Charles, (772 or 773–811), Count of Maine from 781, joint King of the Franks with Charlemagne from 800